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Unfortunately, like with many things in French, the prepostition that a verb or phrase takes is something you just have to learn by heart!
Fortunately, b...
Start by factoring out the common term, so in this case a.
a(q - c) = d
Now divide by a on both sides to isolate the (q - c)
(q - c) = d/a
Now ad...
1) An ecosystem is an ecological system
2) An ecosystem is a system of plants and animals that live together in a particular env...
1) River pollution can affect people, wildlife and the environment.
2) Loss of oxygen: River creatures and river plants need oxygen to ...
1) In the lower course of the river the gradient is gentler than in the upper course. The river has more energy and the volume amount of water is high.
2...
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